"Four young researchers; or, Surveys of the Tropics" - an exciting adventure book by the famous author Oliver Optik. In this book, readers go with four young heroes on an exciting journey to the tropics. They explore exotic flora and fauna, meet local residents and share impressions of the beauty of nature around. Four Young Explorers book; Or, Sight-Seeing in the Tropics will take readers into a world of adventure and discovery, leaving an unforgettable impression on every page.